Software Venture Consulting

FileMaker Pro downloads & Resources
FileMaker Custom Functions
FileMaker Web Viewer Examples
FileMaker Pro & Lasso Consulting
FileMaker Books
FileMaker Articles
FileMaker Error Reference

Free Web Tools
Free FileMaker Tools

Personal Pages

Shopping Cart
Shopping Cart


Free Newsletter


Privacy Policy

FileMaker is a registered trademark of FileMaker, Inc. in the U.S. and other countries.


 FileMaker Pro Custom Functions

List  |  Show Random  |  Upload  |  Add This to Your Site

FilterFileName ( text ; filetype )

Rate this function:  

  Average rating: 4.6  (34 votes)
  Discuss this Custom Function

Michael Myett, FileMaker Apps

filtering field contents as a file name when exporting record set to Excel or Acrobat file

Sample Input:
Filter File Name ( team , 1 )
Sample Output:
red sox.xls

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


FileMaker allows you to export record sets to either an Excel or Acrobat file. If you are using a scripted export routine using some field contents as an automated file name, this function will filter any characters that would cause a illegal file name ( in windows ). This will avoid an error when running your script, by removing illegal characters.

For example, use the formula to set a variable in a script which exports a record set to an Excel or Acrobat file. The variable would create a filtered file name with illegal characters removed. This is good for Windows only. Sorry. I don't have access to a Mac to work that out and believe there are some different characters. Anyone who would like to add to this for Mac, feel free.

Make file type = 1 to add a Excel file extension to file name or file type = 2 for Adobe Acrobat file extension.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


I would change the second parameter to be the extension. That way this function could also be used when exporting container contents.

Sean, Birmingham
March 03, 2011 7:50pm

Exactly what I was looking for. Thank you so much!

Denise, Boston
March 28, 2014 3:24pm

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 5 + 8 =
Search for Custom Functions:

Custom Functions Widget
Download the Custom Function Dashboard Widget for OS X
Keep all the latest Custom Functions right at your fingertips!

Newest Custom Functions:

1. SortList ( theList )
  (Sat, Jun 23, 8:45am)
2. HexUUIDToNum_cf (_uuid)
  (Sat, Jun 16, 1:55pm)
3. httpResponseCode ( responseHeaders )
  (Tue, Jun 12, 10:40pm)
4. FindDuplicateCharacters ( string )
  (Fri, Jun 08, 5:01pm)
5. FieldRepetitionLast ( field ; maxRepetition )
  (Wed, Jun 06, 6:05pm)
6. CountModifiedRecords ( NameTimestampField ; StartTimestamp ; EndTimestamp )
  (Mon, May 28, 8:23am)
7. JSONArrayLength ( JSONArrayStr )
  (Fri, May 25, 7:46am)
8. interpolation (y1; y2; y3; x1; x2; x3; x1y1; x2y1; x1y2; x2y2; rnd)
  (Sat, May 19, 3:55am)

RSS Feed of Custom Functions